wxGUI/lmgr: fix launch GCP Manager if not map display is activated (O…

…SGeo#2464)
tmszi · Jul 16, 2022 · cedbf77 · cedbf77
1 parent f120a69
commit cedbf77
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/gui/wxpython/lmgr/giface.py b/gui/wxpython/lmgr/giface.py
@@ -60,10 +60,11 @@ def __len__(self):
 
     def __iter__(self):
         """Iterates over the contents of the list."""
-        item = self._tree.GetFirstChild(self._tree.root)[0]
-        while item and item.IsOk():
-            yield Layer(item, self._tree.GetPyData(item))
-            item = self._tree.GetNextItem(item)
+        if self._tree:
+            item = self._tree.GetFirstChild(self._tree.root)[0]
+            while item and item.IsOk():
+                yield Layer(item, self._tree.GetPyData(item))
+                item = self._tree.GetNextItem(item)
 
     def __getitem__(self, index):
         """Select a layer from the LayerList using the index."""